592 



CRUSTACEA. 



Pal^mon carcinus {Fair.) 

 Singapore, East Indies. 



Smaller specimen, six inches long, including beak. Colour, grayish 

 and greenish brown, or blue; long arms, dark olive; carpus, blue; eye, 

 black. Larger specimen, nine inches long. Colour, mostly olive- 

 green; extremity of abdomen, dark blue; long arms, blue-black, with 

 some parts near the joints and along outer side smalt-blue. 



3. Carapax margine antico infra oculum spina una armatus, pone hanc non altera. 



Pal^emon Gaudichaudii (Edwards). 

 Valparaiso, Chili. 

 Edwards, Crustaces, ii. 400; D'Orbigny's S. A. Crustacea, pi. 17, f. 2. 



Genus HYMENOCERA, Latreille. 



Rostrum mediocre. Oeuli oblongi. Antennas internae bifidce, ramis 

 brevibus, uno foliaceo. Pedes antici tenues, manu elongato-subulata, 

 digitis minutis. Pedes secundi lati, manu latissime foliaced. Maxil- 

 lipedes foliacei. 



Rostrum of moderate length. Eyes oblong. Inner antennae bifid, 

 branches short, one foliaceous. Feet of anterior pair slender, 

 having a slender subulate hand, fingers minute at apex. Second 

 feet with a very broad foliaceous hand. Six remaining feet vergi- 

 form, unguiculate. Maxillipeds foliaceous. 



This genus was established by Latreille, but has been but imper- 

 fectly described, as the specimen is not to be found in the collections 

 at Paris. The description of the Paumotu species and the figure 

 were made from the living animal, and supply some additional infor- 



